Pith Number

pith:2SAB4MPL

pith:2009:2SAB4MPLNQUUFZKXK2OSQF5WGP

not attested not anchored not stored refs pending

Chemical Evolution of the Juvenile Universe

G. J. Wasserburg, Y.-Z. Qian

arxiv:0903.1264 v1 · 2009-03-06 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2SAB4MPLNQUUFZKXK2OSQF5WGP}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:14:36.761509Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4801e31eb6c2942e557569d2817b633e0a2dd1933d402581785561f530986b2

Aliases

arxiv: 0903.1264 · arxiv_version: 0903.1264v1 · doi: 10.48550/arxiv.0903.1264 · pith_short_12: 2SAB4MPLNQUU · pith_short_16: 2SAB4MPLNQUUFZKX · pith_short_8: 2SAB4MPL

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/2SAB4MPLNQUUFZKXK2OSQF5WGP \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: d4801e31eb6c2942e557569d2817b633e0a2dd1933d402581785561f530986b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5c7022ca3096544ca653c33768fa12dda037b1b921540f17412eb88b7ac39e94",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-03-06T17:48:25Z",
    "title_canon_sha256": "73322df1ae0befa3cba9ca4b7cbeab4ef635b4c810c07a04904c3a808dfe4f6e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.1264",
    "kind": "arxiv",
    "version": 1
  }
}